Fixed bug #63874 (Segfaul if php_strip_whitespace has heredoc)

T_END_HEREDOC don't carry a token value anymore since commit 4cf90e06c
Bugfix by Nikita for bug #60097

NEWS

@@ -3,6 +3,7 @@ PHP                                                                        NEWS
 ?? ??? 201?, PHP 5.5.0 Alpha 3
 
 - General improvements:
+  . Fixed bug #63874 (Segfault if php_strip_whitespace has heredoc). (Pierrick)
   . Fixed bug #63822 (Crash when using closures with ArrayAccess).
     (Nikita Popov)
   . Add Generator::throw() method. (Nikita Popov)

Zend/zend_highlight.c

@@ -186,7 +186,6 @@ ZEND_API void zend_strip(TSRMLS_D)
 			
 			case T_END_HEREDOC:
 				zend_write((char*)LANG_SCNG(yy_text), LANG_SCNG(yy_leng));
-				efree(token.value.str.val);
 				/* read the following character, either newline or ; */
 				if (lex_scan(&token TSRMLS_CC) != T_WHITESPACE) {
 					zend_write((char*)LANG_SCNG(yy_text), LANG_SCNG(yy_leng));

ext/standard/tests/strings/bug63874.phpt

@@ -0,0 +1,16 @@
+--TEST--
+Bug #63874 (Segfault if php_strip_whitespace has heredoc)
+--FILE--
+<?php
+echo php_strip_whitespace(__FILE__);
+
+return <<<A
+a
+A;
+?>
+--EXPECT--
+<?php
+echo php_strip_whitespace(__FILE__); return <<<A
+a
+A;
+?>